blessing wrote:How do you determine a mid-75 percentage range from an ogive

The highest dot on the ogive gives the total. The mid-75% part is the part that has 12.5% below and 12.5% above; this is the other 25%. Use percents to get the amount that is 12.5% and the amount that is 100% - 12.5%. In between these is the mid-75% part.